E lima ituaiga faavae oapa siliva:austenitic, ferritic, martensitic, duplex, ma le faʻamaʻaina o timuga.
(1) Austenitic stainless steels e le maneta, ma o le uʻamea sui togi e 18% chromium faaopoopo ma se aofaiga o le nickel faaopoopo e faateleina ai le corrosion tetee.O lo'o fa'aaogaina fa'ameamea uamea.
(2) Ferrite o le mageta, ma o le chromium elemene o lona autu autu, faatasi ai ma se vaega o le 17%.O lenei mea o loʻo i ai le faʻamaʻiina lelei.
(3) Martensitic uʻamea uʻamea foi maneta, o le anotusi o le chromium e masani lava 13%, ma o loʻo i ai se vaega talafeagai o le carbon, lea e mafai ona faʻamaʻaʻaina e ala i le tineia ma le faʻafefe.
(4) Duplex uʻamea uʻamea o loʻo i ai se fausaga faʻafefiloi o le ferrite ma le austenite, o le mea o loʻo i totonu o le chromium o loʻo i le va o le 18% ma le 28%, ma le mea o loʻo i totonu o le nickel o le va o le 4.5% ma le 8%.E matua tete'e i le pala o le chloride.Fa'ai'uga lelei.
(5)O mea masani o le chromium i le uʻamea uʻamea uʻamea o le 17, ma se aofaʻi o nickel, kopa ma le niobium e faʻaopoopoina, lea e mafai ona faʻamaʻaʻaina e ala i timuga ma le matua.
E tusa ai ma le fausaga metallographic, e mafai ona vaevaeina i:
(1)Ferritic stainless steel (400 series), chromium uʻamea uʻamea, e masani ona faʻatusalia e Gr13, G17, Gr27-30;
(2)Austenitic stainless steel (300 series), chromium-nickel stainless steel, e masani ona faʻatusalia e 304, 316, 321, ma isi;
(3)Martensitic uʻamea uʻamea (200 faasologa), chromium-manganese uʻamea uʻamea, maualuga carbon anotusi, e masani ona faʻatusalia e 1Gr13, ma isi.
Taimi meli: Sep-28-2022